RPL32（核糖体蛋白L32）是核糖体60S大亚基的组成蛋白之一，属于RPL基因家族（核糖体蛋白家族），该家族成员均参与核糖体组装及蛋白质翻译过程。核糖体是细胞内负责将mRNA翻译为蛋白质的分子机器，RPL32作为结构蛋白，与其他核糖体蛋白共同维持核糖体稳定性，并直接参与mRNA解码和肽键形成。其表达产物为碱性蛋白，具有保守的核糖体结合域，主要定位于细胞质中的核糖体上。若RPL32发生突变（如错义突变或缺失），可能导致核糖体组装异常，引发翻译效率下降、错误蛋白积累，甚至触发核糖体应激反应（ribosomal stress），进而影响细胞增殖或凋亡。研究发现RPL32与某些癌症（如乳腺癌、肝癌）相关，其突变或表达异常可能通过干扰p53通路（一种抑癌基因通路）促进肿瘤发生。当RPL32过表达时，可能因核糖体超负荷引发内质网应激（ER stress，一种细胞器功能紊乱状态），导致未折叠蛋白反应（UPR）；而低表达则直接削弱翻译能力，影响细胞生长。RPL基因家族的共性包括：高度保守的序列、参与核糖体生物发生（ribosome biogenesis）、多数为小分子量碱性蛋白，且部分成员（如RPL5、RPL11）具有核糖体外的调控功能（如结合MDM2抑制p53降解）。需注意"核糖体蛋白L32"的中文译名可能存在差异（原英文：ribosomal protein L32）。

核糖体，催化蛋白质合成的细胞器，由一个小40S亚基和60S大亚基。一起这些亚基组成的4 RNA种类和大约80结构不同的蛋白质。该基因编码一种核糖体蛋白，它是60S亚基的一个组成部分。该蛋白属于L32E家族核糖体的蛋白质。它位于细胞质中。虽然一些研究已经映射了该基因到3q13.3-Q21，它被认为是映射到3p25-P24。作为典型编码核糖体蛋白的基因，有该基因通过基因组分散的多个经处理的假基因。编码相同蛋白质可变剪接转录物变体已经观察到这种基因。 [由RefSeq的，2008年7月提供]

RPL32 encodes ribosomal protein L32, a highly conserved, small-molecular-weight basic protein that serves as an essential structural component of the 60S large subunit of the eukaryotic ribosome. As a member of the RPL gene family, RPL32 plays a pivotal role in ribosome biogenesis and the maintenance of ribosomal integrity, directly facilitating the decoding of messenger RNA and the catalytic formation of peptide bonds during protein translation. The protein is primarily localized to cytoplasmic ribosomes, where its conserved ribosome-binding domains ensure stable association with the large subunit, thereby supporting efficient protein synthesis. Disruptions in RPL32 function, such as missense or deletion mutations, can compromise ribosome assembly and translational fidelity, leading to the accumulation of misfolded proteins and the activation of ribosomal stress responses that ultimately perturb cell proliferation and apoptosis. In the context of oncogenesis, aberrant expression or mutation of RPL32 has been implicated in the development of breast and liver cancers, potentially by interfering with the p53 tumor suppressor pathway; notably, while some ribosomal proteins like RPL5 and RPL11 exert extra-ribosomal regulatory effects by binding MDM2 to stabilize p53, dysregulation of the broader ribosomal machinery can disrupt this balance. Furthermore, RPL32 overexpression may induce endoplasmic reticulum stress and activate the unfolded protein response due to translational overload, whereas its downregulation directly attenuates cellular growth by impairing global protein synthesis capacity, highlighting the gene's critical role in maintaining proteostasis and cellular homeostasis.

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